Omron E5AJ-A2HB - User Manual

Omron E5AJ-A2HB

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E5J Temperature Controller

Operation Manual

Cat. No. Z103-E3-1

Table of Contents

Questions and Answers:

B
Bradley Gallagher MDAug 11, 2025
Why does hunting not stop on my Omron Temperature Controller?
- V
  Valerie WilliamsAug 11, 2025
  Hunting might not stop because the control period is too long for the controlled device's characteristics, causing hunting in sync with the control period. Shorten the control period to resolve this. Alternatively, continuous external disturbances may affect the temperature before a previous disturbance has stabilized. In this case, a 100% improvement may not be possible, but you can widen the stable range to exceed the temperature change so that HT will not be ON.
R
Robert SellersAug 18, 2025
How to fix the fluctuating response of Omron E5AJ-A2HB Temperature Controller?
- D
  Daniel WilliamsAug 18, 2025
  A fluctuating response, alternating between good and bad, may occur if there is a heater or cooling device not controlled by the Temperature Controller's control output (e.g., forced heating or cooling is executed using alarm outputs). In this case, fuzzy self-tuning may not work. Set the control mode to advanced PID and adjust the PID constants manually.
J
Julie HallAug 27, 2025
What to do if Omron E5AJ-A2HB Temperature Controller response fails to reach operational requirements?
- J
  John ReynoldsAug 27, 2025
  If the response fails to reach operational requirements, it could be due to continuous characteristics changes. To address this, you can either adjust the stable range so that fuzzy self-tuning will not be turned ON, or set the control mode to the advanced PID and manually adjust the PID constants. Another reason could be that the response speed of the controlled device is too fast for a sampling period of 500 ms. Note that the Thermac E5 J Temperature Controller cannot support a sampling period of less than 500 ms. Finally, the temperature may be affected by nearby devices. Fuzzy self-tuning does not support countermeasures against interference, so set the control mode to the advanced PID and manually adjust the PID constants.

Omron E5AJ-A2HB Specifications

General

Model	E5AJ-A2HB
Type	Temperature Controller
Number of Control Outputs	1
Number of Alarms	2
Input Type	Thermocouple, RTD
Output Type	Relay
Control Method	PID
Display Type	Digital
Power Supply	100-240 VAC
Communication	RS-485
Ambient Temperature	0 to 55°C

Summary

Introduction

Features

Basic features of the Thermac E5J Temperature Controller.

Models

Details on different Thermac E5J Temperature Controller models.

Specifications

Technical specifications and ratings of the controller.

Sensor and Mode Settings

Disassembly

Procedure for disassembling the controller to access internal settings.

Output Units

Available output units and their ratings.

Internal Switch Settings

Configuration of internal switches for various settings.

Settings Before Operation

Nomenclature

Identification and description of front panel components.

Setting Flowchart

Visual guide for parameter setting procedures.

List of Parameters

Overview of configurable parameters by display level.

Parameters on Display Level 0

Parameters for frequent adjustments.

Parameters on Display Level 1

Parameters for less frequent adjustments.

Fuzzy Self-tuning

Fuzzy Self-tuning Operation

Procedures for using fuzzy self-tuning.

Step Response Tuning (SRT)

PID tuning using the step response method.

Disturbance Tuning (DT)

PID tuning based on disturbance response.

Hunting Tuning (HT)

PID tuning to suppress hunting.

Troubleshooting

Solutions for issues with fuzzy self-tuning.

Terminology

Definitions of terms related to tuning and control.

Installation and Wiring

Installation

Guidelines for installing the controller.

Dimensions and Mounting Holes

Physical dimensions and mounting requirements.

Mounting Method

Procedures for mounting the controller in a panel.

Wiring

General precautions for wiring the controller.

Connection

Methods for connecting wires to terminals.

Terminal Arrangement

Diagram showing terminal connections for models.

Troubleshooting

Error Display and Output

Interpretation of error codes and outputs.

Troubleshooting

Common problems and their solutions.

Event Input Function

Event Input Function

How the event input function operates.

Set Point Selection

Selecting set points via event input.

RUN;STOP Selection (E5 AJ-B, E5 EJ-B)

Controlling operation via event input.

Signal Input Method

Types of signals for event input.

Heater Burnout Detection

Heater Burnout Detection

Principle of heater burnout detection.

Heater Burnout Procedures

Steps for detecting and handling burnout.

Wiring the Current Transformer

Instructions for wiring the CT for detection.

Heater Burnout Alarm Value

Setting the alarm value for burnout detection.

Setting Examples

Practical examples of setting alarm values.

Engineering Level Settings

Engineering Level

Accessing the engineering level settings.

Engineering Level Parameter List

A list of all parameters in the engineering level.

Engineering Level Parameters

Detailed explanation of engineering level parameters.

Auto-tuning

Starting Auto-tuning

Procedure to initiate the auto-tuning process.

Conditions that Prevent Auto-tuning

Circumstances that inhibit auto-tuning.

Force-ending Auto-tuning

Methods to terminate auto-tuning.

Changing Parameters during Auto-tuning

Limitations on parameter changes during tuning.

Appendix A Dimensions;Mounting Holes

E5 AJ Dimensions

Physical dimensions and mounting for E5AJ model.

E5 EJ Dimensions

Physical dimensions and mounting for E5EJ model.

E5 CJ Dimensions

Physical dimensions and mounting for E5CJ model.

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